71700921329 has 4 divisors (see below), whose sum is σ = 71734856676. Its totient is φ = 71666985984.

The previous prime is 71700921289. The next prime is 71700921337. The reversal of 71700921329 is 92312900717.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27790557025 + 43910364304 = 166705^2 + 209548^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71700921329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71700921379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16964504 + ... + 16968729.

It is an arithmetic number, because the mean of its divisors is an integer number (17933714169).

Almost surely, 2^71700921329 is an apocalyptic number.

It is an amenable number.

71700921329 is a deficient number, since it is larger than the sum of its proper divisors (33935347).

71700921329 is a wasteful number, since it uses less digits than its factorization.

71700921329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33935346.

The product of its (nonzero) digits is 47628, while the sum is 41.

The spelling of 71700921329 in words is "seventy-one billion, seven hundred million, nine hundred twenty-one thousand, three hundred twenty-nine".